Georg frederik haldkjar



(No Model.)

' G. P. HALDKJAR. MEGHANISM'FOR PRODUCING INTERMITTBNT ROTARY MOTION.

No. 547,349.- Patented Oct. 1, 1895.

INVENTOR- wrr/mssiz/ BY 7 A TIORNEYS NI'IED STATES PATENT OFFICE.

. GEORG FREDERIK HALDKJAR, OF COPENHAGEN, DENMARK.

MECHANISM FOR PRODUCING INTERMITTENT ROTARY MOTION.

SPECIFICATION forming part of Letters latent No. 547,349, dated October 1, 1895. Application filed May 31, 1895. Serial No. 551,197- (No model.)

To 00% whom it may concern:

Be it known that I, GEORG FREDERIK HALD- KJAR, of Copenhagen, Denmark, have invented certain new and useful Improvements in Mechanism for Producing Intermittent Rotary Motion, of which the following is a specification.

This invention relates to certain improvements in mechanisms for producing intermittent rotary motion or motion taking place in successive abrupt movements or jerks, and it will be best understood by reference to the description following hereinafter, and to the accompanying drawings, in which- Figures 1 and 2 are two plans or top views of the improved mechanism represented in two different positions. Fig. 3 is a side elevation of the mechanism, and Fig. 4. is a perspective view of a street pillar or column for the display of advertisements to which this mechanism for imparting intermittent or jerky rotary motion is applicable.

Like characters of reference designate corresponding parts in all the views.

The invention will be hereinafter described, and the features of novelty will be pointed out in the appended claims.

In carrying out my invention a disk a, with a turned-up edge or flange a, is secured to a spindle a which is set in rotary motion at a constant rate of speed in the direction indicated by the arrows m, Figs. 1 and 2, by means of properly-regulated clockwork, by electricity,0rin any other convenient manner. The flange a of the disk is provided with a number of suitably-spaced notches or slotsb b b the distance between which may be either uniform or not. In conjunction with this device I arrange a spindle c, carrying a double arm or lever d, the ends of which are provided with projecting pins f f sufflciently narrow to be capable of passing through the notches b 12 b By means of suitable transmissiongearing, or through any other convenient agency, the spindle 0 receives motion from some source of motive power, such as a powerful spring, for example, which would constantly tend to turn the said spindle in the direction indicated by the arrow n, Figs. 1 and 2.

As shown in Fig. 1, the pin f when in the position shown in that figure is arrested by the outer surface of the flange a of the disk a. As the disk turns the notch b will arrive opposite the pin f, thereby enabling such pin to pass through the said notch, when the double arm or lever at will be swung around to the position indicated in Fig. 2. In this position the pin f will be retained by the flange a of the disk, but only by the inner surface thereof. Now when the notch 12 has reached the position in front of the pin f, such pin will again be able to pass through it, and consequently the double arm will be swung arou nd and returned to the position shown in Fig. 1; but in this case the pin f 2 will be in contact with the outer surface of the flange of the disk. The double arm and consequently the spindle 0 will thus complete a revolution in four successive movements or strokes. The extent of such movements and the intervals between them will depend upon the length of the arm, the number of notches, and the speed of rotation of the disk 0,. It may therefore be varied at pleasure.

The intermittent rotary motion obtained by the aid of the mechanism above described may be turned to account in a variety of ways. Thus it may be mentioned, merely by way of example, that it may constitute a valuable attachment to advertising apparatus, or the means of advantageously displaying various articles orexhibits which may have to be placed on view. These and kindred objects instead of, as hitherto, remaining stationary or revolving at a constant and uniform speed may now be rotated intermittently, which kind of motion is, better than any other calculated to attract and arrest the notice of spectators. As an illustration of this I have shown in Fig. 4 a rotary pillar or column adapted for use in displaying bills or posters, and to which mechanism such as I have herein described may with advantage be applied. The mechanism is supposed to be inclosed within the base or pedestal as, the column or pillar proper y being mounted or pivoted upon the spindle c of such mechanism.

The top of the column may be decorated in any suitable way and have several statues or ornaments placed upon it instead of one figure only, as shown, and such figures or statues whatever their number may be adapted to perform movements imitating natural gestures, such as may now be seen in connection with clocks, musical boxes, and other toys.

Instead of applying the mechanism to a pillar such as this it may,as will be readily understood, be similarly employed in connection with glass show-cases or the like exhibiting goods for sale, also with small barrels filled with wine, beer, and the like, or with hats or similar articles. Furthermore,it may be utilized on dinner tables, which of course must be constructed accordingly, or mechanism such as this may be arranged Within the stands of what are known as cabarets or liquor sets, fruit dishes, &c. It will also prove very serviceable when applied to kiosks, panoramas, and the like.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The herein described mechanism for producing intermittent rotary motion, comprising an arm mounted to swing and provided with projections, and a disk mounted to rotate about an axis located eccentrically relatively to that of the swinging arm, said disk having alternating notches and solid portions arranged to move across the path of travel of the projections on the said arm, substantially as set forth.

2. The herein described mechanism for producing intermittent rotary motion, compris ing anarm mounted to swing and provided with projections, and a disk mounted to rotate about an axis located eccentrically relatively to that of the swinging arm, said disk having a notched flange projected at an angle to its plane of rotation, the notches being arranged to move across the path of travel of the projections of the said arm, substantially as set forth.

3. The herein described mechanism for producing intermittent rotary motion, comprising a spindle adapted to be controlled by a source of motive power, an arm mounted to rotate with said spindle and provided with projections, and a disk arranged to rotate continuously and having a notched flange projecting at an angle to its plane of rotation, the flange being disposed in the path of travel of the projections on the said arm to temporarily arrest the rotation thereof, and release the arm Whenever a projection thereon registers with a notch of the'said flange, substan tially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

GEORG FREDERIK lIALDKJAll.

Witnesses:

CHARLES GUDE, RoB'r. J. KIRK. 

